SECTION 3
OPERATION
3-1 General
1. This transceiver uses a PLL synthesizer controlled by micro-computer. The operating frequency can be shifted in
either 5 kHz or 25 kHz steps.
2. Operating frequencies can be set by simply pressing the keys on the keyboard. Frequencies can also be stored in the
memory channels (15 channels).
3. Transmitter precautions
(1) The TR-7800 antenna impedance is 50 ohms. Be sure to connect an antenna of 50 ohms impedance.
(2) Check the transmit frequency before operating to insure that you do not interfer with other stations.
(3) By pressing the microphone PTT switch, the TR-7800 is set in transmit mode; the ON AIR Indicator will light
and the meter indicates transmit power. Hold the microphone about 5 cm from your mouth and speak.
4. Micro-Computer Reset (At first power-up)
If, at initial TURN-ON, an erroneous or incorrect readout is displayed, reset the MICRO-COMPUTER. This is not
an equipment malfunction.
To proceed:
(1) Disconnect the power plug from the DC power terminal (21) and after about five seconds reconnect the power
plug. Turn on the power switch (1).
(2) if BACK-UP BATTERIES INSTALLED
First remove the batteries, and reset the MICRO-COMPUTER as previously described. Reinstall the batteries.
